Mental illness can result from the inability to cope effectively with the recurrent stresses of living in today's world.

Which of the following is responsible for attaching the implant to the bone?

A) Osseointegration B) Dental calculus C) Dental biofilms D) Acid etching/resin

Using a computer equipped with a modem and communications software, you can perform several types of _______________ transactions. 

Fill in the blank(s) with the appropriate word(s).